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Geologic units in Throckmorton county, Texas

Lueders Formation (Permian; Leonard Series) at surface, covers 14 % of this area

Lueders Formation

Santa Anna Branch Shale (Permian; Wolfcamp Series) at surface, covers 12 % of this area

Santa Anna Branch Shale

Admiral and Coleman Junction Formations, undivided (Permian; Wolfcamp Series) at surface, covers 11 % of this area

Admiral and Coleman Junction Formations, undivided

Jagger Bend and Valera Formations, undivided (Permian; Leonard Series) at surface, covers 10 % of this area

Jagger Bend and Valera Formations, undivided

Elm Creek Formation (Permian; Leonard Series) at surface, covers 8 % of this area

Elm Creek Formation

Bead Mountain Formation (Permian; Leonard Series) at surface, covers 7 % of this area

Bead Mountain Formation

Sedwick and Moran Formations, undivided (Permian; Wolfcamp Series) at surface, covers 7 % of this area

Sedwick and Moran Formations, undivided

Grape Creek Formation (Permian; Leonard Series) at surface, covers 6 % of this area

Grape Creek Formation

Admiral Formation (Permian; Wolfcamp Series) at surface, covers 5 % of this area

Admiral Formation

Alluvium (Holocene) at surface, covers 5 % of this area

Alluvium

High gravel deposits (Pleistocene) at surface, covers 4 % of this area

High gravel deposits

Talpa Formation (Permian; Leonard Series) at surface, covers 3 % of this area

Talpa Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 2 % of this area

Terrace deposits

Clear Fork Group (Permian; Leonard Series) at surface, covers 2 % of this area

Clear Fork Group

Archer City Formation (Permian; Wolfcamp Series) at surface, covers 1 % of this area

Archer City Formation

Pueblo Formation (Permian; Wolfcamp Series) at surface, covers 1 % of this area

Pueblo Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 0.7 % of this area

Quaternary deposit, undivided

Coleman Junction Formation (Permian; Wolfcamp Series) at surface, covers 0.7 % of this area

Coleman Junction Formation

Markley Formation (Pennsylvanian to Early Permian) at surface, covers 0.6 % of this area

Markley Formation

Harpersville Formation (Pennsylvanian; Virgil Series) at surface, covers 0.2 % of this area

Harpersville Formation

Seymour Formation (Middle Pleistocene; Irvingtonian) at surface, covers 0.1 % of this area

Seymour Formation

Dune sand sheet deposits (Holocene) at surface, covers < 0.1 % of this area

Dune sand sheet deposits